import CryptoJS from "crypto-js";

const AES_KEY = 'bpm369!@#Authine';
export default {
  //随机生成指定数量的16进制key
  generatekey(num: number) {
    let library = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
    let key = "";
    for (var i = 0; i < num; i++) {
        let randomPoz = Math.floor(Math.random() * library.length);
        key += library.substring(randomPoz, randomPoz + 1);
    }
    return key;
},

//加密
encrypt(word: string, keyStr: string = "") {
    keyStr = keyStr ? keyStr : AES_KEY; //判断是否存在ksy，不存在就用定义好的key
    var key = CryptoJS.enc.Utf8.parse(keyStr);
    var srcs = CryptoJS.enc.Utf8.parse(word);
    var encrypted = CryptoJS.AES.encrypt(srcs, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
    return encrypted.toString();
},
//解密
  decrypt(word: string, keyStr: string = "") {
    keyStr = keyStr ? keyStr : AES_KEY;
    var key = CryptoJS.enc.Utf8.parse(keyStr);
    var decrypt = CryptoJS.AES.decrypt(word, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 });
    return CryptoJS.enc.Utf8.stringify(decrypt).toString();
  }
}